The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2017
Filed:
Dec. 23, 2014
Applicant:
Tula Technology Inc., San Jose, CA (US);
Inventors:
Matthew A. Younkins, San Jose, CA (US);
John W. Parsels, San Jose, CA (US);
Joel D. Van Ess, Campbell, CA (US);
Siamak Hashemi, Farmington Hills, MI (US);
Assignee:
Tula Technology, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 15/04 (2006.01); F02D 41/00 (2006.01); F02P 17/12 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0087 (2013.01); F02P 17/12 (2013.01); F02D 2041/0012 (2013.01); F02P 2017/123 (2013.01);
Abstract
A variety of methods and arrangements for determining whether a high pressure exhaust spring is present in a cylinder of an internal combustion engine are described. For spark ignition engines, the electrical properties of the spark plug spark gap may be used to determine whether a high pressure exhaust spring is present.